Next to national defense, energy security has become a primary issue for the survival and wellbeing of both developed and developing nations. A review of the literature shows how concerns for energy security acquired a new dimension after the collapse of the Soviet Union in 1991, when the Western powers and a weakened Russia competed for the control of the Eurasia region and its energy resources. Research has also focused on how different countries have developed a variety of strategies for securing their energy supply. Energy security literature can be split into three general sections: neoclassical economics and public choice, bureaucratic politics and public administration, and political economy. Scholars have also explored regime theory, resource conflict, and the relationship between national energy security and foreign policy. In the case of the United States, four major challenges in foreign policy issues related to energy security can be identified: “building alliances, strengthening collective energy security, asserting its interests with energy suppliers, and addressing the rise of state control in energy.” These challenges require eight specific foreign policy responses from the U.S. government, two of which constitute the core relationship between energy security and foreign policy making: “candor and respect” for the producer countries, and foreign policies that promote the stability and security of suppliers.